Add the missing placement service to the sample config

Closes-Bug: #1939325

Signed-off-by: Gabriel Calixto <gabrielcalixto9@gmail.com>
Change-Id: Icb6f3cc9501b13cb1f770ca6bc370c3b02b2db35
diff --git a/README.rst b/README.rst
index 0254938..3fd608a 100644
--- a/README.rst
+++ b/README.rst
@@ -35,7 +35,7 @@
     LOG_COLOR=False
     RECLONE=yes
     ENABLED_SERVICES=c-api,c-bak,c-sch,c-vol,cinder,dstat,g-api,g-reg,key
-    ENABLED_SERVICES+=,mysql,n-api,n-cond,n-cpu,n-crt,n-sch,rabbit,tempest
+    ENABLED_SERVICES+=,mysql,n-api,n-cond,n-cpu,n-crt,n-sch,rabbit,tempest,placement-api
     CINDER_ENABLED_BACKENDS=lvmdriver-1
     CINDER_DEFAULT_VOLUME_TYPE=lvmdriver-1
     CINDER_VOLUME_CLEAR=none